Bus



FIG. 1 is a left front perspective view of a bus showing my new design;

FIG. 2 is a left rear perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a front elevational view thereof. 

The ornamental design for a bus, as shown. 